Looking for chocolate confectioner's sugar
Has anyone ever seen prepackaged chocolate confectioner's sugar? I have an old recipe that calls for it, and I used to be able to find it in Florida in a regular grocery store years ago. I know I could mix cocoa and confectioner's sugar, but I would not know the correct proportion. I have tried Wegman's, Giant, Harris Teeter, Whole Foods, Safeway, and Trader Joe's.
Any leads would be a big help. Thanks!